<template>
  <div class="comment-reply">
    <van-nav-bar
      :title="comment.reply_count > 0 ? `${ comment.reply_count }条回复` : '暂无回复' "
    >
      <van-icon 
        slot="left" 
        name="cross"
        @click="$emit('close')"
      ></van-icon>
    </van-nav-bar>
    <div class="scroll-wrap">
      <!-- 当前评论项 -->
      <comment-item 
        :comment="comment"
      ></comment-item>
      <!-- 评论的回复列表 -->
      <van-cell title="全部回复"></van-cell>
      <comment-list
        :list="commentList"
        :source="comment.com_id"
        type= 'c'
      ></comment-list>
    </div>
      <!-- 发布评论 -->
      <div class="post-wrap">
        <van-button 
          class="post-btn" 
          size="small" 
          round
          @click="isPostShow = true"
        >写评论</van-button>
      </div>
    <!-- 评论列表弹层 -->
    <van-popup v-model="isPostShow" position="bottom">
      <comment-post
        :target="comment.com_id"
        @post-success="onPostSuccess"
      ></comment-post>
    </van-popup>
  </div>
</template>

<script>
import CommentItem from "./comment-item"
import CommentList from "./comment-list"
import CommentPost from "./comment-post"
export default {
  name: 'CommentReply',
  data () {
    return {
      isPostShow: false, //控制回复评论弹层
      commentList: []
    }
  },
  props: {
    comment: {
      type: Object,
      required: true
    }
  },
  components: {
    CommentItem,CommentList,CommentPost
  },
  methods: {
    onPostSuccess (data) {
      // console.log(data);
      // 更新回复的数量
      this.comment.reply_count++
      // 关闭弹层
      this.isPostShow = false 
      // 将最新回复的内容展示到列表的顶部
      this.commentList.unshift(data.new_obj)                                                                                                      
    }
  }
}
</script>

<style scoped lang="less">
.scroll-wrap {
  position: fixed;
  top: 92px;
  left: 0;
  right: 0;
  bottom: 88px;
  overflow-y: auto;
}
.post-wrap {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #fff;
  border-top: 1px solid #d8d8d8;
  .post-btn {
    width: 60%;
  }
}
</style>